a. A specified quantity of a therapeutic agent, such as medicine, prescribed to be taken at one time or at stated intervals.
b. The amount of radiation administered as therapy to a given site.
2. An ingredient added, especially to wine, to impart flavor or strength.
3. An amount, especially of something unpleasant, to which one is subjected: a dose of hard luck.
4. Slang A venereal infection.
tr.v. dosed, dos·ing, dos·es
1. To give (someone) a dose, as of medicine.
2. To give or prescribe (medicine) in specified amounts.
[French, from Late Latin dosis, from Greek, something given, from didonai, to give; see dō- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The American Heritage Dictionary Blog
Check out our blog, updated regularly, for new words and revised definitions, interesting images from the 5th edition, discussions of usage, and more.
American Heritage Dictionary Products
The American Heritage Dictionary, 5th Edition
The American Heritage Dictionary of Idioms
The American Heritage Roget's Thesaurus
Curious George's Dictionary
The American Heritage Children's Dictionary
The American Heritage Dictionary of Indo-European Roots
The American Heritage Student Grammar Dictionary
The American Heritage Desk Dictionary + Thesaurus
The American Heritage Science Dictionary
The American Heritage Dictionary of Business Terms
The American Heritage Student Dictionary
The American Heritage Essential Student Thesaurus